A) A transformer for a transistor radio reduces 120 V ac to 9 V ac (Such a device also contains diodes to change the 9 V ac to dc). The secondary contains 30 turns and the radio draws 400 mA. Calculate (a) the number of turns in the primary, (b) the current in the primary.

A) A transformer for a transistor radio reduces 120 V ac to 9 V ac (Such a device also contains diodes to change the 9 V ac to dc). The secondary contains 30 turns and the radio draws 400 mA. Calculate (a) the number of turns in the primary, (b) the current in the primary.

Modern Physics

3rd Edition

ISBN:9781111794378

Author:Raymond A. Serway, Clement J. Moses, Curt A. Moyer

Publisher:Raymond A. Serway, Clement J. Moses, Curt A. Moyer

Chapter12: The Solid State

Section: Chapter Questions

Problem 2Q

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A) A transformer for a transistor radio reduces 120 V ac to 9 V ac (Such a device also
contains diodes to change the 9 V ac to dc). The secondary contains 30 turns and the radio
draws 400 mA. Calculate (a) the number of turns in the primary, (b) the current in the
primary.

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